Method of operating printing-telegraph receivers.



. PATENTED JAN. 24, 1905.

J. M. JOY. METHOD OF OPERATING PRINTING TELEGRAPH REGEIVEBS.

APPLICATION FILED AUG. 1, 1902.

\ yg invcwlfoz 971 V @151 4 -12 al'fozncl 6 I E] J t UNITED STATESPatented January 24, 1905.

PATENT OFFICE.

JOHN M. JOY, OF NEW YORK, Y., ASSIGNOR TO PAGE MACHINE OOM- PANY, OF NEWYORK, N. Y., A CORPORATION NEW YORK.

METHOD OF OPERATING PRINTING-TELEGRAPH RECEIVERS- SPECIFIGA'IION formingpart of Letters Patent No. 780,663, dated January 24, 1905.

Application filed August 1, 1902. Serial No- 117,995.

of a printing-telegraph receiver, although the method may be used inconnection with any class of apparatus to which it is applicable.

The object of my invention is to increase 1 5 the rate of speed at whicha printing-telegraph receiver or other like apparatus may be worked witha minimum of power and high efficiency.

Further objects of my invention will herein' after appear;- and to theseends my invention consists in the method of operating electricalapparatus, substantially as hereinafter fully set forth in thisspecification, suitable apparatus for carrying out my method beingillustrated in the accompanying drawing, which representdiagrammatically a sending and a receiving station with circuits andapparatus for operating a printing-telegraph receiver.

While many different kinds of apparatus may be provided for carrying outmy im- 0 proved method of operation, I have chosen to illustratediagrammatically apparatus for carrying out my invention such as shownand described in my copending application, Serial I No. 118,524, filedAugust 5, 1902-, and entitled Improvements in printing-telegraphreceivers, for I have shown the apparatus in the aforesaid applicationas operated bythe method herein described, although the method has nottherein been claimed. 4 I Since the mechanical construction of theprinting-telegraph receiver forms no part of mypresent invention, I haveillustrated the parts in diagrammatic relation, with sufficient of theapparatus only shown to enable my present invention to be understood.

Referring to the drawing, X represents a sending-station, and Yareceiving-station, with suitable circuits and apparatus connecting thetwo for transmitting messages .and for recording them according to myinvention. At

the sending-station any suitable form of apparatus may be provided fortransmitting impulses over the line, while at the receivingstation Y aprinting-telegraph receiver is located, preferably of substantially thesame construction and having the general mode of operation as thatdescribed in my application above referred to, wherein polarizedelectromagnetic apparatus is provided for control ling the operation ofthe type-wheel, while unpolarized apparatus is provided for controllingthe operation of the mechanism for printing the character selected andfor controlling the paper-feeding mechanism. Oircuits are shown having anumber of receivers connected to distributing bus-bars or mains a a, andin the diagrammatic representation of apparatus at the receiving-stationY the escapementlever 131 is actuated by means of a polarized relaycomprising the magnets 151, 152, 153, and 15 1, the circuits of whichare diagrammatically shown. Means are provided for polarizing the coresof these magnets, as shown the coils 151 and 152 being used for thispurpose, while alternating currents or impulses of different signs aresent through the coils 153 154:, alternately strengthening one core andweakening the other, and thereby vibrating the escapement-lever 131,thus allow ing rotation of the escapement-Wheel 130 for selecting thedesired characters or space on the type-wheel 7. The magnet 201 is alsoincluded in the circuit of the coils 153 154 for a purpose hereinafterto appear.

In the diagram M, denotes a suitable motor connected to the shaft 133,from which the power for actuating the mechanism of the receiver isderived, while Ais a suitable source of electric energy for the motor,represented as a storage battery. A circuit including coils 151 and 152and a switch 200, controlled by magnet 201, is also derived from thebattery A, and said coils 151 and 152 are so wound that the cores 155and 156 are polarized with the oppositely-arranged poles of the samesign, as indicated by the letters S S and N N in the diagram. The coils153 and 154: are then so wound that upon passing a positive impulsethrough them the magnetism of one of the cores, as 155, will bestrengthened, while that of the other, as 156, will be neutralized, andthen upon passinga negative impulse through these coils themagnetism ofcore 156 will be strengthened, while that of core 155 will beneutralized, and thus the escapement-lever 131 will be attracted to oneside or the other, according to the character of the impulse transmittedover the line.

Referring more particularly to the drawing, suitable means are shown atB of anyordinary or usual character for determining the number ofalternations in the current sent over the line, and, as shown, a commonform of pin-cylinder 157 is provided, with thirty-eight pins arranged ona shaft 158, which by any suitable means tends to rotate, but is heldtherefrom by controlling-levers 159, corresponding to the characters onthe type-wheel, butone of whichlevers is shown. A driving-pulley 160 maybe connected with a suitable source of power for operating thepin-cylinder 157, and a friction-clutch 161 is shown in this instancebetween the gearing connected to the driving-pulley 160 and thepin-cylinder shaft 158, so that the drivingpulley may at times rotatewith the driving pin-cylinder. I also provide a shaft 163, which may bedriven by any suitable power and, as shown, is connected to be drivenfrom the driving-pulley 160, and I have shown it connected therewith bya friction-clutch 162. Said shaft 163 carries an escapement-wheel 164k,controlled by an escapement-lever 165,

adapted to be actuated by a magnet 166, and also upon the shaft 163 isarranged acommutator 167, with brushes 168 169 bearing thereon connectedin circuit with a generator C, which generator is also connected withbrushes 170, bearing upon a commutator 171. In this instance a switch203 is shown included in the circuit of the generator C, while anothergenerator, 204, is adapted to be connected in series with generator C orcut out of circuit. The generator C in this instance is a directcurrentmachine and supplies current for actuating the polarized magnetscontrolling the operation of the letter-selecting escapement 81, thedirect current being commutated at the commutator 171 into alternatingpositive and negative impulses and passing from the commutator bybrushes 17 2 to the distributing-line a a, from which connection ismade, as by the leads 5 6, to coils 153 and 154 of the polarized relaysconnected to actuate the escapement-lever 131,

Means are provided for rotating the coinmutator 171, as shown aconnection being made through gearing to the pin-cylimlei' shaft 158,and any suitable form of commutator may be provided, it only beingnecessary that as the commutator rotates with the brushes 170 and 172bearing thereon the direct current from the generator l shall betransformed into alternating impulses. The number of these impulses iscontrolled at will by means of the levers 159, and means are providedfor automatically printing each character after it has been selected,and this is accomplished by means of the printing-magnets orcontrolling-magnets 96 and the mechanism which they control. After thecharacter desired to be printed has been selected and is in position tohave an impression taken there from the circuits and apparatus are soarranged that the printing or controlling magnets 96 become operativel yenergized, thereby affecting the armature 97, actuating theescapement-lever93, withdrawing thepawl 173 from engagement with thetooth 171 on the escapement-wheel 70, and allowing said escapement-Wheel to rotate in the direction of the arrow until the tooth 175 comesinto engagement with a pawl 176 on the other side of the escapementlever93. It will thus be seen that the tooth 177 on the escapement-wheel isabout in readiness to engage the pawl 173 when the magnets 96 becomedei'mergized after the printing has taken place.

Suitable means are provided, as shown in the application above referredto, for feeding the type-Wheel; but this means has not been illustratedin the present case, and, furthermore, as the figure is but adiagrammatic representation of one means of carrying out my inventionthe apparatus has been much simplilied for the sake of clearness, and inthis connection any suitable means are shown for causing theprinting-platen to strike the type-wheel 7. In this instance abell-crank lever 178, pivoted at 179, is adapted to beactuated by pinsor stops 180, connected to the escape1nent-wheel 70. As the alternatingimpulsestraverse the circuits connected with the generator C, the switch203 being in the position shown in the drawings, magnets 153 and 15 1are operated by means of such impulses to actuate the escapementlever131, the printing or controlling magnets 96, which are u1'1polarizcd,arenotoperatively energized by the alternating current, and, as

shown, they are so connected in the shunt as to receive the alternationsin the line. \Vhile the printingor controlling magnets 96 may beconnected in the circuit in any desired manner, they are preferablyconnected in shunt to the line, since with this arrangement thecontrolling-magnets may be constructed to have a greater impedance thanthat of the coils 153 and 154: in the main circuit. This arrange mentcauses the greater portion of the alternating current to traverse thecircuits in the magnetism to attract the armature 97 against magnets 158and 154 rather than that of the controlling or printing magnets 96.Other ad vantages are gained by this arrangement of circuits, which willhereinafter appear. The magnet 166, controlling the escapement-lever165, is also not operatively energized by alternating currents passingthrough its circuit cl d, shown as connected in shunt to the main line.As soon as the pin-cylinder 157 comes to rest with the desired characteron the type-wheel selected and in position to be printed a constantcurrent will momentarily flow from the generator C through suitableresistances R R and through commutator 171 to the magnet 166, energizingsaid magnet and causing it to attract its armature, thereby releasingthe escapement-wheel 164 and allowing it to rotate through half arevolution, thereby causing the conducting portions 181 on thecommutator 167 to pass momentarily beneath the brushes 168 and 169, thusshort-circuitingthe resistances R R for an instant of time and allowingmore direct current to' momentarily flow from the generator 0 to andthrough the commutator 171 to the line a a, energizing the printing orcontrolling magnets 96 sufficiently to cause them to attract thearmature 97. This increase of current which caused the magnet 96 toattract the armature 97 was but momentary in order to provide sufficientits spring, and then the normal strength of the current passing from thegenerator 0 to resistance R R is sufficient to hold said armature 97 ina retracted, position as long as desired. By arranging thecontrolling-magnets 96 in 'a shunt to the line and in shunt to theescapement-magnets and making the controlling-magnets of less resistancethan those controlling the escapement, but of greater im-' pedance, moredirect current will flow through the controlling-magnets, which is to bedesired.

Suitable means are provided for deenergizing a circuit of the battery A,and thus prevent the operation of the receiver as long as desired. Themeans thus provided are preferably controlled from a distance, as at thetransmitting-station X, and to these ends the magnet 201 and switch 200are includedin the operating-circuits at the receiver, while thegenerator 204 is arranged to be switched into circuit at thetransmitting-station and momentarily increase the tension of the line tooperate the magnet 201. The magnet 201 may be included in any suitableportion of the receiving-circuits; but as shown it is included in serieswith c'oils 153 and 154: and'in shunt to the printing-magnet 96.Switchmagnet 201 is so designed and adjusted that it will not becomesufficiently energized to actuate its armature 205 under the ordinaryworking condition of the circuits, and means are provided for boostingthe line when desired in order to actuate switch-magnet 201.

For this purpose the additional generator 20& is provided at thetransmitting-station, for by throwing the switch 208 from contact 206 tocontact 207 generator 204 may be included in series with generator C,and thus raise the potential of the lines sufiiciently to cause magnet201 to become energized and actuate its armature 205. This armature 205is shown as one arm of a bell-crank lever 208, pivoted at 209 and havingat its other end a crosspiece 210, provided with stops 211, whilepivoted at 214: is a flier or arm 218, provided with a stop 218 andconnected to move with a pinion 215, meshing with a gear 216, to whichthe switch 200 is connected. I Contacts 217 cooperate with the switch200, and to these contacts are connected wires leading from the batteryA, so that the switch 200 is in series with the battery. The object ofthese mechanical and electrical connections is .to enable thebattery-circuit to be broken when desired; but other suitable means maybe substituted for those illustrated without departing from the spiritof my invention.

The shaft to which the switch 200 is connected is provided with. apinion 220, meshing with a gear 221 upon a winding-stem 222, from whichthe switch mechanism is actuated when released by the arm or flier 213.Upon lever 208 being actuated to release stop .218 from stop 211 the arm213 will make nearly one revolution under the influence of thespring-actuated gearing connected thereto and it will be brought to astop again against stop 212. The gear 217 will have been rotated throughnearly one whole revolution to break the circuit at switch 200. Bymoving the switch 203' to the position shown in the drawings thehigh-potential current sent to the line is reduced, reducing theoperative current sent through magnet 201, so that by thus deenergizingmagnet 201 and releasing armature 205 the stop 218 will be releasedfrom' stop 212 and brought against stop 211, thereby allowing the arm213 to complete a full revolutionand complete the circuit at the switch200. This brings. the potential of the line back to normal. The switch200 is used simply to connect and disconnect the battery A of thereceiving instrument into and out of operative circuit, so thatbattery-power can be saved when the receiving instrument is out ofoperation for any continued length of time.

Obviously some features of my invention may be used without others, andmy invention may be embodied in widely-varying forms.

Therefore without enumerating equivalents nor limiting myself to theconstruction shown and. described, I claim, and desire to obtain byLetters Patent, the following:

1. The method substantially as herein described of operating aprinting-telegraph receiver,which consists in transmittingimpulses ofalternating current to said receiver for selecting a character to beprinted, transmitting a direct current over the line, automaticallymomentarily increasing the line-potential for printing the characterselected, and then automatically reducing the line-potential again tonormal strengh.

2. The method substantially as herein described of operating aprinting-telegraph receiver, which consists in transmitting alternatingcurrent over the line for selecting the characters to be printed, thenchanging from alternating current to direct current, and automaticallyincreasing the normal strength of said direct current momentarily tocause the printing of the character selected.

3. The method substantially as herein described of operating aprinting-telegraph receiver, which consists in transmitting impulses ofalternating current to the receiver for selecting the characters to beprinted, preventing the printing until desired by means of impedance,transmitting over the line a direct current of insuflicient strength tocause the printing of the character selected, and then momentarilyincreasing the line-potential to cause the printing of said character.

4. The method substantially as herein described of operating aprinting-telegraph receiver,which consists in transmitting impulses ofalternating current to the receiver for selecting the characters to beprinted, transmitting over the line a direct current of insuflicicntstrength to cause the printing of the character selected, automaticallymomentarily increasing the line-potential to cause the printing of saidcharacter, and then automatically reducing the line-potential to normalstrength.

In testimony \vhereoiI have signed my name to this specification in thepresence of two subscribing Witnesses.

JOHN M. JOY.

Witnesses:

WM. L. VAIL, HAMILTON MUsK.

